The spelling of the word "Yionna" can be explained using International Phonetic Alphabet (IPA) transcription. It is pronounced as /jɛɔnə/, with the stress on the second syllable (represented by the symbol 'ɔ'). The 'Y' in the spelling represents the consonant sound '/j/', which is a palatal approximant. The first syllable starts with the vowel 'ɛ', which is pronounced as "eh". The second syllable has the vowel sound 'ɔ', which is pronounced as "aw". The final syllable ends with the schwa sound, represented by the symbol 'ə'.